Which of These Is a Weakness of Direct Marketing

Which of these is a weakness of direct marketing?

A) Direct marketing is a relatively untargeted method of trying to reach potential customers.
B) Messages using direct marketing may differ between direct mailings, confusing the target market.
C) Direct marketing is expensive and time-consuming due to the development and maintenance of a database.
D) For direct marketing, it is difficult to get media cooperation.
E) Direct marketing can lead to promotion wars.